Abstract: 【Objective】 In order to explore the effects of different canopy light quality components on photosynthetic characteristics and fruit quality of jujuba, the main wavelengths of visible light that affect photosynthetic characteristics and fruit quality were selected. 【Method】 The composition of light quality,photosyntheticcharacteristicsand fruit quality of different canopy of jujuba were determined by variance analysis and multivariate statistical analysis. 【Result】 The total absolute radiant energy of different canopy of jujube was as follows: upper layer > outer layer > middle layer > middle layer > lower layer > inner layer; the red absolute radiant energy accounted for the total of different canopy respectively from upper layer to lower layer and from inner to outer layer 29.85%, 20.19%, 35.26%, 29.90%, 17.35 and 44.05% of absolute radiation. The photosynthetic parameters of leaves were positively correlated with the absolute of blue light, negatively correlated with the absolute radiation energy of green light; the carotenoids, chlorophyll, anthocyanins and flavonoids were positively correlated with the absolute radiation energy of violet light, while the titratable acids, soluble sugars and anthocyanins were positively correlated with the absolute radiation energy of blue light, the chlorophyll was positively correlated with the absolute radiation energy of green light, and the chlorophyll and carotenoids were positively correlated with the absolute radiation energy of blue light There was a positive correlation between auxin and flavonoids and the absolute radiant energy of red light. 【Conclusion】 Increasing longer wavelength of red light can improve the quality of light. Red light is the main factor affecting the photosynthetic characteristics and fruit quality of jujube. It is suggested to supplement 370-470 nm and 600-770 nm wavelength of light quality in production to improve leaf photosynthesis and fruit quality.